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Fox31 Denver is digging into the history of 17-year-old Austin Sigg. He's in custody and faces charges for the murder and kidnapping of 10-year-old Jessica Ridgeway in Westminster.

Senior investigative reporter Josh Bernstein confirmed that the teenager had been treated for an addiction to pornography.

Bernstein reports family members say he was just 15 years old and his addiction was so strong that it required counseling.

Additionally, we learned he left the mainland of the United States shortly after an alleged attempted abduction at Ketner Lake on Memorial Day Weekend.

Sigg also faces charges related to that incident. Investigators say the teen attacked a 22-year-old female jogger. She told police a man grabbed her from behind and shoved a chemical-soaked rag over her mouth.

She was able to escape from the attacker.

After the Ketner Lake incident, Sigg and his family went on vacation in the U.S. Virgin Islands. They stayed at a luxury resort.

Local police in the Virgin Islands told Bernstein they were unaware of his arrest until we contacted them and provided them with details.

A spokesperson says they have yet to be contacted by the FBI or any other law enforcement agency that might be tracking Sigg's movements before the murder of Jessica Ridgeway.

We asked the FBI if investigators were of the suspect's travels and they said they would pass along the information to their agents and will see where it leads. They declined further comment.

Law enforcement officials in the Virgin Islands were very concerned to learn Sigg had stayed in their area. They asked Fox31 Denver to provide as much information as possible. We gave them a copy of Austin Sigg's mug shot and a copy of his custody report.

A spokesperson says there is a lot of crime in the U.S. Virgin Islands, but there were no known missing persons cases. Nevertheless, they will be taking a closer look.